Carbon quantum dots enhance the photocatalytic performance of BiVO4 with different exposed facets

Abstract

Carbon quantum dots (CQDs) were demonstrated to have the ability to enhance the photocatalytic performance of monoclinic BiVO4 with different exposed facets under visible light.

Catalytic Applications of Carbon Dots

“…The CDs/NiFe-LDH complex exhibits high electrocatalytic activity (with overpotential *235 mV in 1 M KOH at a current density of 10 mA cm −2 ) and stability for oxygen evolution. This almost exceeded those of any previous Ni-Fe compounds and even was comparable to that of the lowest overpotential reported in Ni-Fe catalysts, ∼230 mV at 10 mA cm −2 for electrodeposited Ni-Fe films [169,207,217]. Typically, nickel acetate and iron nitrate (with a molar ratio of Ni/Fe = 5) were hydrolyzed in a mixed N,N-dimethylformamide (DMF) and CDs aqueous solution at 85°C for 4 h. Followed by redispersing the intermediate product in a DMF/H 2 O mixed solvent and through a solvothermal treatment at 120°C for 12 h, then a second solvothermal step at 160°C for 2 h. The solvothermal treatment may lead to the crystallization of NiFe-LDH nanoplates and formation of the nanocomposites.…”

Core-substituted naphthalenediimides anchored on BiVO4 for visible light-driven water splitting

“…27,28 Recently, the photocatalytic enhancement of semiconductor based (i.e. TiO2) materials impregnated with a visible active polymer, i.e.…”

Solvothermal synthesis of nanostructured BiVO4 with highly exposed (0 1 0) facets and enhanced sunlight-driven photocatalytic properties

“…3b). In the light of the present literatures, those m-BiVO 4 products with preferred orientation growth of (0 1 0) facets possess this kind of sheet-like morphology [28,29]. The BiVO 4 sample synthesized with 25% glycerol aqueous solution (Fig.…”

“…It has been reported that the surface structure of photocatalysts plays an important role to their photocatalytic activities because the photocatalytic reaction or photoelectron conversion takes place only when photogenerated electrons and holes are available on the surface [21][22][23][24]. Many semiconductor photocatalysts have active facets for photocatalysis, for example, the (0 0 1) facets of anatase TiO 2 are much more reactive than the thermodynamically stable (1 0 1) facets [25][26][27][28]. For m-BiVO 4 , research interest has already started in tuning its crystal facets for optimizing the photocatalytic reactivity.…”